If General Revelation is the message from God to us through the natural world, Special Revelation is His word to us through the supernatural world.
Special revelation includes physical appearances of God, dreams, visions, the written Word of God, and most importantly—Jesus Christ.[i]
Jesus reveals more about God than Creation, miracles and scriptures can together. Furthermore, the Holy Spirit has come to amplify Jesus and all other revelations of God that have been given.
Jesus listened to the reoccurring themes of human worry and anxiety. He brought comfort and taught us to look to the supernatural by observing the natural realm. Often our temporal concerns are rooted in metaphysical fears. We are afraid of perishing. We worry that God is not present to help us. So, Jesus took a look around and pointed out what God had been trying to say all along.
I’m not sure how much consciousness birds have of God, but I doubt that any of them are agnostics. Birds know what they know and that may include an awareness of the Creator. All creation is apparently waiting for God to restore everything. What are we waiting for?